Solenoid valve device

Abstract

In a solenoid valve device in which connection terminals, each of which is connected to one of a plurality of solenoid valves fixed in a mounting block, are placed inside a common coupler, a coupler assembly integrally comprising the coupler is detachably mounted on the mounting block at a position which is spaced back from each of the solenoid parts, and elastic connecting members made from an electrically conductive metal are provided between each of a plurality of first flat terminals which are fixedly positioned on the side of the coupler assembly facing the mounting block so as to connect to the corresponding electrically conductive lead members arranged in the coupler assembly and second flat terminals, each of which is arranged at the rear end of each of the solenoid parts so as to be individually opposite the first flat terminals. The solenoid part of each of the solenoid valves and the respective connection terminals inside the coupler can thus be connected and disconnected extremely easily and, moreover, any erroneous connection can be avoided.

What is claimed is:  
     
       1. A solenoid valve device in which a plurality of solenoid valves each comprising a valve part whose tip end is fitted in a fixed mounting block and a solenoid part whose tip end is provided continuously at a rear end of said valve part are fixed to said mounting block, and connection terminals, each of which is connected to the solenoid part of the respective solenoid valves, are placed inside a common coupler, wherein a coupler assembly integrally provided with said coupler is detachably mounted on said mounting block at a position which is spaced back from each of said solenoid parts, a plurality of electrically conductive lead members, each of which has one end connected to said connection terminals respectively, are arranged in said coupler assembly, and elastic connecting members made from an electrically conductive metal are respectively interposed between a plurality of first flat terminals, each of which is connected to the other end of the corresponding lead member and fixedly positioned on the side of said coupler assembly facing the mounting block, and second flat terminals which are arranged at the rear ends of said respective solenoid parts so as to be individually opposite the first flat terminals. 
     
     
       2. A solenoid valve device according to  claim 1 , wherein said coupler assembly is comprised of a first body made from a synthetic resin integrally provided with said coupler and a second body made from a synthetic resin which is mounted on the first body such that they overlap each other, wherein said lead members which each have one end connected to a plurality of said connection terminals respectively which are fixedly positioned inside said coupler, and said first flat terminals, each of which is connected to the other end of said lead members respectively, are arranged on the side of the first body facing the second body, and wherein insertion holes, into each of which a part of each of said elastic connecting members is inserted, are provided on the second body so as to correspond to said first flat terminals respectively. 
     
     
       3. A solenoid valve device according to  claim 2 , wherein a plurality of recessed parts which housing the first flat terminals respectively are provided on the side of the first body facing the second body, and a plurality of fitting projections, each of which is made in the form of a tube so as to form a part of each of said insertion holes, are projectingly provided on the second body so as to be capable of fitting in each of said recessed parts. 
     
     
       4. A solenoid valve device according to  claim 2  or  claim 3 , wherein each of said insertion holes is made in the form of a tapered hole whose diameter increases as it goes towards the first body and each of said elastic connecting members is a conical coil spring whose larger diameter end is positioned on the side of the first body. 
     
     
       5. A solenoid valve device according to  claim 2  or  claim 3 , wherein a plurality of hooks which elastically engage with one of the first and second bodies are integrally provided on the other of the first and second bodies.